Knuckle-cracking is both commonplace and cryptic: Why on earth do our knuckles make that annoying popping noise when we crack them? Scientists have speculated on the question for decades, but only now ...

There aren’t any awards to be won for solving science’s minor mysteries—why yawning is contagious, why puppies make us melt—but that doesn’t mean we don’t want the answers anyway. Add to those ...

Some people like the sound of knuckle-cracking and others loathe it, but for years there has been disagreement among scientists about what actually causes it. Researchers said on Wednesday they have ...

Knuckles crack when a bubble forms in a joint, new high-speed images reveal. The finding, reported April 15 in PLOS ONE, may settle a decades-old debate about the source of the sound. In 1947, two ...

"Pull my finger," a phrase embraced by school-aged kids and embarrassing uncles the world over, is now being used to settle a decades-long debate about what happens when you crack your knuckles.

Some people like the sound of knuckle-cracking and others loathe it, but for years there has been disagreement among scientists about what actually causes it. Researchers said on Wednesday they have ...

Scientists think they may have solved an old question about the cracking of knuckles: Why does it make that sound? The crack apparently comes from a bubble forming in the fluid within the joint when ...

There aren’t any awards to be won for solving science’s minor mysteries—why yawning is contagious, why puppies make us melt—but that doesn’t mean we don’t want the answers anyway. Add to those ...

Whether you love it or hate it, cracking knuckles is a common habit we've likely all done at some point. It's one of life's simple pleasures for some people, who crave the satisfying "pop" and ...